Shape‐Deformable and Locomotive MXene (Ti3C2Tx)‐Encapsulated Magnetic Liquid Metal for 3D‐Motion‐Adaptive Synapses. (14th November 2022)

• Record Type: Journal Article
• Authors: Kim, HoYeon; Lee, Kyuho; Oh, Jin Woo; Kim, Youngwoo; Park, Jung‐Eun; Jang, Jihye; Lee, Seung Won; Lee, Seokyeong; Koo, Chong Min; Park, Cheolmin
• Is Part Of: Advanced functional materials. Volume 33:Number 5(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-11-14
• Subjects: 3D motion adaptive synapses -- magnetointeractive locomotion and shape deformation -- magnetoresponsive gate electrodes -- MXene‐encapsulated liquid metals -- nonvolatile ferroelectric polymer memory; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.202210385
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract: Owing to their unique surface chemistry, room‐temperature pseudoliquidity, and high electrical conductivity, gallium‐based liquid metals (LMs) exhibit multifunctionality. To grant deformable and self‐flowing characteristics to LMs, magnetic particles are incorporated for precisely controlling the LM motion and shape deformability. However, LM surface‐adhesion and corrosivity hinders the integration of LMs into complex circuits and devices owing to potential alloying with other metals and contamination of their surroundings. In this study, a highly conductive Ti3 C2 T x (MXene)‐encapsulated magnetic LM (MX–MLM) is developed using a feasible fabrication method. The MX–MLM comprises magnetic particles suspended within its core and self‐assembled MXene flakes on the surface to maintain the nonwettability and high electrical conductivity of a liquid droplet. The noncorrosivity and increased magnetism of the MX–MLM enable nonstick magnetic‐field‐induced locomotion and shape deformation on various surfaces including metals, oxides, and polymers. Furthermore, the MX–MLM exhibits recyclability and magnetic‐field‐induced self‐healing. To demonstrate its functionality, the MX–MLM is employed as a magnetointeractive, shape‐deformable, and locomotive top gate electrode in a transistor fabricated using a ferroelectric polymer gate insulator. The device exhibits excellent magnetointeractive synaptic capability for detecting and learning 3D path information. Abstract : An Ti3 C2 T x (MXene)‐encapsulated magnetic liquid metal (MX–MLM) is synthesized for application to 3D‐motion‐adaptive synapses. The MX–MLM exhibits magnetic‐field‐induced shape deformability, locomotion, self‐healability, recyclability, and nonwettability and has excellent potential for application to single‐neural‐network artificial‐intelligence‐based magnetic‐path‐tracking systems to simultaneously sense, learn, and adapt to different magnetic fields.